The Channel name and bio must be no more than 255 characters long 6How to manage your Telegram channel? The main design elements of your Telegram channel include a name, bio (brief description), and avatar. Your bio should be: The optimal dimension of the avatar on Telegram is 512px by 512px, and it’s recommended to use PNG format to deliver an unpixelated avatar. In the “Bear Market Screaming Therapy Group” on Telegram, members are only allowed to post voice notes of themselves screaming. Anything else will result in an instant ban from the group, which currently has about 75 members.
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